It’s nice when husband and wife can remain friends after divorce, but Donald and Ivana Trump seemed to take it a step further yesterday at the Rosa Cha fashion show. It looked like they were double-dating.

Ivana introduced her new Italian boyfriend, Rossano Rubicondi, 31, an aspiring movie producer, to Donald and his longtime girlfriend, Croatian cutie Melania Knauss, at the runway show at Cipriani 42nd Street.

The Trumps weren’t expecting to see each other, but managed to smile for the camera despite the potential awkwardness of the situation.

Donald seemed somewhat surprised by the relative youth of Rubicondi, who danced with the London Ballet.

The day before, the two couples graced the front row of the Oscar de la Renta show, though separated by about 15 seats.

The Trumps managed to avoid trashing each other in 1990 during their hotly contested divorce, when Ivana tried to have their prenuptial contract voided.

Both remarried, Donald to Marla Maples, and Ivana to Riccardo Mazzucchelli. But both remarriages also ended in divorce.